Filter.



PATENTED NOV. 22, 1904. 0. MEHNERT & P. PAPE.

FILTER.

APPLICATION FILED APR. 14, 1903.

4 SHEETS-SHEET 1.

N0 MODEL.

No. 775,475. PATENTEDI NOV. 22, 1904.

0. MEHNERT 62 P. PAPE.

FILTER.

APPLICATION FILED APR.14,,1903.

N0 MODEL. 4 SHEETS-SHEET 2.

WE? 65/6679. 2% yew/501% No. 775,475. PATENTED NOV-22, 1904. 0. MEHNERT & P. PAPE.

4 SHEETS-SHEET 3.

NO MODEL.

PATENTED Nov zz, 1904.

0. MEHNBRT & P. PAPE.

FILTER.

APPLIGATIONAPILED APR. 14, 1903.

4 SHEETS-SHEBT 4.

NO MODEL.

In veaz Z0 5 who;

N0. '77 5.47 5. Patented November 22, 1904.

IJNHED STATES PATENT Orricn.

OTTO MEHNERT AND PAUL PAPE, OF KOTHEN, GERMANY, ASSIGNORS TO THE FIRM OF MASOHINENFABRIK AKTIEN-GESELLSOHAFT, VORM. WAGNER 8: (10., OF KOTHEN, GERMANY.

FILTER.

SPECIFICATION forming part of Letters Patent No. 775,475, dated November 22, 1904. Application filed April 14, 1903. Serial No. 152.587. (N0 model.)

T ll wh m i m y n n: may beused; but advantageously rubber cush- Be it known that we. O'r'ro MEHNERT, a subions or the like are used. It will be seen from ject of the King of Saxony, and a resident of Fig. 2 that in the tank a inwardly-projecting No. 2 Baasderferstrasse, and PAUL PArE, a annular rings r are provided at both ends, the 5 subject of the Duke of Anhalt, and a resident diameter of which rings corresponds to the of No. 2 Verlangerte, Baasderi'erstrasse, Kodiameter of the ends t of the cylinder 0. The then, Anhalt, Germany, have jointly invented cylinder 0 is exactly fitted between the rings 1-, 5 5 certain new and useful Improvements in Filand rubber or the like rings Z) Z) are provided ters, of which the following is an exact specififor efiiecting an air-tight joint. IO cation. Z; k are set-screws between which the axle Our invention relates to improvements in of-the cylinder Z is situated and by means of filters, and more especially to filters to be used which the cylinder 0 can be adjusted in the for filtering the waste liquids of paper and axial direction for the purpose of effecting a cellulose manufactories; and it has for its purtightening of the joints. I 5 pose to provide a filtering apparatus by means For leading water into the cylinder 0 a waof which comparatively large quantities of ter-pipe Z is provided, which is connected, as waste liquids can be filtered and the filtering shown in Fig. 1, to the side wall of the tank 5 residue can easily be removed and utilized. a,so that in consequence of the cylindercbeing In order to make our invention more clear, open on both sides the water can flow through 2 we refer to the accompanying drawings, in the pipe Z into the interior of the cylinder 0. which- The pipe Z is provided with a valve Ztfor con- Figure 1 is a side view of the apparatus. trolling the admission of water. At the same 7 Fig. 2 is a vertical longitudinal section of the side of the water-inlet pipe Z a discharge-pipe same. Fig. 3 is a vertical cross-section and" a is connected to the tank a. This pipe n is 2 5 diagrammatic view of the device for leading fixed to the cup-shaped side wall m of this the filtering residue to its place of destination; tank, to which the pipe Z is also fixed. The and Fig. 4: is a side view of the sieve-cylinder, interior of this cup-shaped side wall commushowing the arrangement for tightening the nicates naturally, as shown, with the interior same. of the cylinder 0, so that in case the pipe at is 3 In the drawings, a is a trough-shaped tank. opened the water in the cylinder 0 will be dis- In this tank a hollow cylinder 0 is situated, charged through this pipe a. The pipe n conmanufactured of a wire webbing, perforated sists of two or more separate pipes shifted 30 metal plates, or the like sieve material, which one into the other, so as to form a so-called cylinder can be rotated around the axis g. telescopic pipe. 3 5 The cylinder 0 is almost entirely surrounded o is a valve for opening and closing the by an endless band of filtering material as, pipe at. for instance, a suitable webbing, felt, or the Within the cup-shaped side wall at of the 5 like. At the smaller upper part, at which the tank a a float .2 is situated, which float concylinder is not covered by the endless band, trols a valve or cook 3 situated at the end of 4 an elastic cushion (Z is situated, which cushion the pipe Z. The valve or cock is constructed is pressed, by means of screws 8 s 8, upon the so that in raising the float .2 the water-inlet periphery of the cylinder 0. At the sides of pipe Z is closed, whereas in lowering the fioat 9 the mantle of the cylinder 0 elastic strips of the water-inlet pipeZ is opened. In this tightening material i are situated, which are way the level of the water inside the cylinder 45 pressed, by means of the screws 6 and f, c is adjusted.

against the sides oft'he cylinder and against the The apparatus operates as follows: The tightening material (Z. It will be understood waste liquid from the paper or cellulose manthat any kind of elastic tightening material ufacture is led through the pipe a Figs. 1

and 3, into the tank (6, which is usually filled up to the level w. Through the pipe Z fresh water is led into the cylinder 0. If now the valve 4; in the telescope pipe at is opened, the Water in the cylinder 0 flows out, producing a rarefaction of the air in the cylinder 0. By

this rarefaction of the air the liquid as in the v tank a is drawn through the filtering material into the cylinder 0. The filtering residue is retained upon the endless band g. For adjusting the level of the water to inside the cylinder 0 the floating body .2, operating the valve or cock y, is provided.

It will be clear that the mouth of the telescope pipe a must be situated under water and that by adjustingits length the vacuum in the cylinder 0 can be adjusted. I I As may be seen from Fig. 3, the endless band g is guided between thepressing rollers 1), by means of which rollers this endless band g is moved, and consequently the cylinder 0 is rotated. The layer of filtering residue or fibers situated upon the endless band g is pressed between the rollers 2, removing the water still contained in the same. After passing the rollers 12 the' filtering residue is taken OE and brought, by means of the apron u, to its place of destination. q is a scraper for removing the adhering material from the upper roller 2). After removing the filtering residue the endless band g returns to the tank a and serves again for filtering purposes.

Having thus fully described the nature of our invention,what we desire to secure by Letters Patent of the United States is 1. In a filtering apparatus, the combination with a tank for taking up the liquid to be filtered, a hollow cylinder open on both ends and fitted between inwardly-projecting rings provided at the end walls of the tank, means for creating a vacuum in the cylinder and an endless belt of filtering material situated around the cylinder, and a tightening device covering that part of the cylinder not covered by the endless band of filtering material, so as to prevent air, dirt or the like from entering the vacuum-cylinder, substantially as described and for the purpose set forth.

2. In a filtering apparatus, the combination with a tank for taking up the liquid to be filtered, a hollow cylinder open on both ends and fitted between annular projecting rings.

fixed to the end Walls of the tank, a water-inlet pipe connected to one end wall of the tank, a telescopic pipe fixed to one end wall of the tank, and an endless band of filtering material situated around the cylinder, substantially as described and for the purpose set forth.

3. In a filtering apparatus, the combination with a tank for taking up the liquid to be filtered, a hollow cylinder open on both ends and fitted between annular projecting rings fixed to the end walls of the tank, a water-inlet pipe connected to one end wall of the tank, a telescopic pipe fixed to one end wall of the tank, an endless band of filtering material situated around the cylinder, and means for tightening the joint between the annular projecting rings fixed to the end walls of the tank and the ends of the cylinder, substantially as described and for the purpose set forth.

4:. In a filtering apparatus, the combination with a tank for taking up the liquid to be filtered, a hollow cylinder open on both ends and fitted between annular projecting rings fixed to the end walls of the tank, a water-inlet pipe connected to one end wall of the tank, a telescopic pipe fixed to one end wall of the tank, an endless band of filtering material situated around the cylinder, means for tightening the joint between the annular projecting rings fixed to the end walls of the tank and the ends of the cylinder, and a tightening material covering that part of the cylinder not covered by the endless band of filtering material, substantially as described and for the purpose set forth.

In testimony whereof we have signed our names to this specification in the presence of two subscribing Witnesses.

OTTO MEHNERT. PAUL PAPE.

Witnesses:

RICH. REIMANN, P. V. G. DUNN. 

